Jan 5, 2016 @ 0335hrs the 7-7 box was struck for Odor of Smoke in a Residence on Alligator Reef Ave. Eng 7-2 w/4 and Squad 7 driver only responded and was advised that the caller woke up to an odor in her house. Eng 7-2 arrived with nothing evident and began investigating. Eng 13-2 staged at the hydrant and sent there man power forward to assist with investigation. Truck 53 took side A and staged before being assigned basement division to check out the HVAC system. Crews found a few burnt wires on the HVAC system and secured them before going in service. 43 also responded and staged.